Dust-collector



. 2 Sheets Sheet 1 w. B. ALLINGT-ON.

DUST COLLECTOR.

' N0. 604,871- Patented May 31, 1898- (No Model.) 2 Sheets8het 2.

w. E. I'ALLINGTOIN.

' DUST COLLECTOR. v N\o.- 604,,871. v Patented M ay31, .1-898.

spiralpath niay befsaidjtobe-generated near flbql lwhont'it my concern;- I Beitk own thatI,'WILLIAME'.-ALLINGTON,

" g WIL IA E.",A 'I;INeToN,1-oi S'A G'INAW, MICHIGAN. I

a F J 'ou s'r ooLLEe oR.

' i srn cmcnrxon or-tag part of Letters retentiv 604,8 f v I i 1 Application filed March 15,1897. Serial No 627 601. (No model.)

Q QfSaginaWQMiChigan, have invented a' certain 7 new and useful Improyemen't-in. Dust Ool-,

' collectorswhe'rein a-dufst-laden vair-c1irrent is;

r 'a'rated. dust; and in which 7 lectors,

tion.-'

'ofwhich the following is a specifica- -'l his"inyenti'on relates to that class of dustdelivered into-a separatingfihaniber provided withoutle'ts for the. purified'air and the sep-, the separation is eflieeted i fb'y 'centrifugal' force "which masses the particlcs ..carried upon the air current upon the peripheral wall of thechamber, the

latter being ofz'such form asito conduct the material to the dustoutlet, while the purified air escapes ina different direction; In this class of machines the dust and'air outlets'are located axially of the-machine'and.

usually at opposite ends ofthe separatin gchamber,

and the commercial form of the dust-.collector-has a cylindrical body into -:whic l 1 the air isvdelivered, with a conical or tapering portion in Op n coni'municationwith the cylindric'alportion, the purified-airoutlet beingflocated iii-the top .orhead of the cylin-g fdrical portionandl the dust-outletat the tip .of t e conical portion. thisfityp'c are-illustrated in the patent- 120 Noah \V. llolt, dated August 20, 1889, No.v

' Dust '-colleetors of -409 465. i a In-thcoperation ofl 'nachines' of this class .thedust ladcnair entering through the tan-,

gential inlctspout under considerable pressure is given awh-irling or gyrating motion by reason" 'Ofihe shape of the walls *ofth'e chamber, and owingto the constant influx of thecurrent in the upper portion of the chain herthe dust andfother heavier particlesl are driven downwardly in a spiral path, which the mouthofthe air-inlet and: to continue aroundthecasing of the machine to apoint near the dust-outlet, -'lh-i'saction produces a rarefaction tvithinthe' bodyofthe separating-chmnbelgland thereby two ingoing air-I currents are; induced, one entering through the iaxi's cii the dusteoutlet and the -other V T 1 through, the c axis of the purified-airj utIet.

The dust). and air both escape in annular layers .faror ndv the edges of their respective lm tlet's o1f 0.0ncen tri c-' to the 'ingoing currents.

Ilere t-ofore dependence has been had upon the'tapering portion of the casing to carry the separated dust from the periphery ofthe casing to the dust-outlet, and therefore, as

above stated, the. cylindro-conoidal form is the standard constructionand is the best that has yet been devised. This form, is, however, objectionable, because of the cost of construction and of the expense attendant upon its shipment,.-sinc'e" these dustcolle'c-v .tors, although very light in weight, are bulky portion thereofisespeeially and the conical difilcult topack.

It is the object of my produce a machine which conforms. in its construction to the established laws of action of these machines; second, to effect an economy ,in the cost of manufacture and transportation.

To accomplish these objects, l employa construction substantially as shown inlthe accompanying drawings, in which- Figure 1 is anelevation, partly in vertical section, the dotted lines indicating the form of th'e'cone heretofore employed, but which is dispensed'within the'presen't improvement.

the separated dust;

Fig. 2 is an elevation at -r ight augles to the View shown in Fig. 1, the power portion of the outlet-pipe beingbroken away. Fig. 3 1s a sectional plan view. 1

inventiomfirst; to

In carrying'ont-myinvention I preferably employ a cylindrical casing A, having a head through the tangential inlet-spout D. These parts are of usual construction. The lower end of the cylindrical casing is partially or cover B," li-n -which isarranged a tubular guard C and to which the airis' delivered closed by the diaphragm-plate E and consti: tuteswhat may be called the primary separating-chamber. This bottom plate E has near its periphery an ap'e'rture', e and also a centralopcning forthe p'as iage of the reliefpipe F. To the lower s'ide'o this diaphragmplate. E,-.-I- connect the cylindrical pipe G, whichis the secondary separating-chamber I and intowhich a portion of the air passes with j This seconda'ry'chainber G is connected with the aperturee by the is'pirall-pipe II, and said,- pipe' terminates be- -tween andsnbs'tantially in line with the apvertur 1 6;?

inclination '01- -1 -h.e"p ipe ll will "a'nd't-ho inlet B and" enters the seceli'aiqiber 'iangentiallyn' The'pitch or ofcou-rsofr respond or be proportioned to the dimensions and arrangement of the other parts; but it is i found that the dust will perform a'eomplete revolution while passing from inlet to outlet, and therefore I have located the openingeat a point opposite the inlet from the fan and have extended the pipe II near to the axis of the machine, where it delivers through an opening in the side of the pipe G, tangentially to the axis of the latter. The lower end of the chamber G may be left open, or it may be provided with a small cone I to prevent the scattering of the dust. The relief-pipe F may have a valve J therein which will control the passage of the air from the interior of the chamber upwardly through said relief-pipe and thence outwardly through the tubular guard. The chamber G, pipe II, and reliefpipe F are all readily detachable from the cylindrical portion of the casing and may be slipped into the cylindrical portion through the tubular guard, thus making the entire structure more compact and therefore more economical to ship. A further economy is secured in the quantity of material employed. The pipes F and G being straight and relatively small require'less work and less material in their construction than the cone no w commonly employed, the outlets of which are represented by the dotted lines K in Figs. 1 and 2.

The details of construction may be variedas, for example, the relief-pipe and cone may be omitted and the forms of the other parts varied. i,

It will. be found that my construction will be serviceable and will catch the dust quite closely, and while it is not claimed for this structure that it will'effect as close a separa tron as machines which have heretofore been employed, it has certain advantages on" the score of economy and is also of such form that it maybe used in situations where the standard machine could not be convenient] y placed.-

I claim- 1. In a dust-collector, the combination with a primary separating-chamber into which the dust-laden air-current is delivered, of a secondary chamber of cylindrical; for nfrom which the separated dust is disciarged, the axial portions of said chambers beingin open communication with each other for the return of the pnrified air from the secondary to the primary chamber and a pipe or passage con neeting said chambers, the connecting pipe or passage communicating with the primary chamber'near its peripheral wall and with the secondary chamber tangential to the axis thereof, substantiaily as described.

2, In a dust-collector,the combination with a primary chamber having a tangential inlet for the dust-laden air, a purified-air outlet and a bottom wall having an aperture therein near the periphery of the chamber, and a secondary chamber of cylindrical form communicating with the primary chamber through a central aperture in its bottom wall, and also by an external pipe or passage connecting the peripheral aperture and said secondary chamber'and entering the latter tangentially, substantially as described.

3. In adust-collcctor, the combination with a casing providing a primary chamber into which the dust-laden air is delivered, said chamber having a peripheral outlet in its bottom wall for the separated dust, of a secondary chamber of cylindrical form located below the primary chamber and an external duct or passage connecting said chambers, said duct or passage leading from said peripheral aperture to and entejringthe secondary chambertangentially, and an air relief-pipe connecting said chambers, substantially as described.

4. In a dust-collector ofjthe class described, the combination with a casing constituting a primary separatingchamber'into which the dust-laden air-current is delivered, said primary chamber havingits bottom wall provided with a peripheral dust-outlet, of a secondary chamber of cylindrical form ahd an external spiral pipe or passage connecting said secondary chamberltangentially with the peripheral dust-outlet, substantially as described.

5. In adust-collector of the class described, the combination with the primary'and secondary air-chambers of cylindrical form having an external spiral pipe or passage connecting their peri pherics, the'secondary chamher. having adust-outlet to which its walls converge and the primary chamber having a purified-air outlet with a relief-pipe connecting said primary and secondary chambers, substantially as'described.

6. In a dust-collector of the class described, the combination with primary and secondary air-chambers of cylindrical form having a spiral pipe or passage connecting their peripheries, the secondary chamber having a dustoutlet to which its walls converge and the primary chamber having a purified-air outlet with a relief-pipe connecting said primary and secondary chambers, and a" valve in said relief-pipe, substantially as described.

WILLIAM E. ALLiNc'roN. 1

Witnesses? FREDERICK C. GOO'DWIN, A. J. PRATT. 

